The most common and most likely answer to this crossword clue is the 8 letter word TREASURY
I've seen this crossword clue in The Daily Telegraph
T
R
E
A
S
U
R
Y
More clues leading to the result TREASURY
- Arrest guy stupidly wasting first of government funds
- Arsenal are rusty in unorthodox formation
- Hear about revolutionary plan to secure a valuable collection
- State department judge ensnaring a user wrongly
- Go round about America, backing state funds
- Bank processes are rusty
- Hear about a user involved in the Exchequer
- Valuable collection jars are rusty
- A ruse hatched in attempt to get state funds
- Bank’s endeavour: keeping a user in confusion
Buddy explains!

The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does TREASURY mean?
TREASURY noun- A place where treasure is stored safely.
- A place where state or royal money and valuables are stored.
- A collection of artistic or literary works.
- A treasure.
- A government department that manages government finances.